general_fact: 43609 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 43609 is a boring number.
trivia: 43609 is an uninteresting number.
historical_date: May 25th is the day in 1955 that First ascent of Kangchenjunga (8,586 m.), the third highest mountain in the world, by a British expedition led by Joe Brown and George Band.